1969 Chevrolet Chassis Service Manual

• Chevy Chevelle
• Chevy Camaro
• Chevy Nova
• Chevy Corvette

POSSIBLE POINTS OF OIL LEAKS

1. TRANSMISSION OIL PAN LEAK



1. Attaching bolts not correctly torque.



2. Improperly installed or damaged pan gasket.



3. Oil pan gasket mounting face not flat.


2. REAR EXTENSION LEAK



1. Attaching bolts not correctly torque.



2. Rear seal assembly – damaged or improperly installed.



3. Gasket seal – (extension to case) damaged or improperly installed.



4. Porous casting.


3. CASE LEAK



1. Filler pipe “O” ring seal damaged or missing; misposition of filler pipe bracket to engine – “loading” one side of “O” ring.



2. Modulator assembly “O” ring seal – damaged or improperly installed.



3. Governor cover, gasket and bolts – damaged or loose; case face leak.



4. Speedo gear – “O” ring damaged.



5. Manual shift seal – damaged or improperly installed.



6. Line pressure tap plug – stripped, shy sealer compound.



7. Parking pawl shaft cup plug – damaged, or improperly installed.



8. Vent pipe (refer to Item 5).



9. Porous case.


4. FRONT END LEAK



1. Front seal – damaged (Check converter neck for nicks, etc., also for pump bushing moved forward); garter spring missing from pump to converter seal.



2. Pump attaching bolts and seals – damaged or missing, bolts loose.



3. Converter - leak in weld.



4. Pump “O” ring seal – damaged. Also check pump groove and case bore.



5. Porous casting (pump or case).


5. OIL COMES OUT OF VENT PIPE



1. Transmission over-filled.



2. Water in oil.



3. Pump to case gasket mispositioned.



4. Foreign material between pump and case, or between pump cover and body.



5. Case – porous, pump face improperly machined.



6. Pump- shy of stock on mounting faces, or porous casting.

Transmission leaks caused by aluminum case porosity have been successfully repaired with the transmission in the vehicle by using the following procedure.

1. Road test and bring the transmission to operating temperature.



2. Raise the car and with the engine running, locate the source of the oil leak. Check for leaks in all operating positions.



3. Shut off engine and thoroughly clean area with a solvent and air dry.



4. Using the instructions of the manufacturer, mix a sufficient amount of epoxy cement, part #1360016, to make the repair.



5. While the transmission is still hot, apply the epoxy to the area, making certain that the area is fully covered.



6. Allow epoxy cement to dry for three hours and retest for leaks.

• General information
• Lubrication
• Heater and air conditioning
• Corvette body
• Frame
• Front suspension
• Rear suspension
• Brakes
• Engine
• Engine cooling
• Fuel system
• Air injection reactor system
• Clutch and transmission
• Fuel tank and exhaust system
• Steering
• Wheels and tires
• Chassis sheet metal
• Electrical — Body and chassis
• Radiator, Grille
• Bumpers
• Accessories
• Specifications